/Engine/Source/Editor/DataLayerEditor/Public/DataLayer/DataLayerEditorSubsystem.h
Selects/de-selects actors belonging to the DataLayer.
true if at least one actor was selected/deselected.
bool SelectActorsInDataLayer ( [UDataLayerInstance](API\Runtime\Engine\WorldPartition\DataLayer\UDataLayerInstance) * DataLayer, const bool bSelect, const bool bNotify, const bool bSelectEvenIfHidden, const [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FActorFilter](API\Editor\DataLayerEditor\DataLayer\UDataLayerEditorSubsystem\FActorFilter) > & Filter )